발간논문

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Vol.11, No.1, 1 ~ 10, 1973
Title
On the Morphology and Growth of Gamma Prime Precipitates in a Nickel - Base Superalloy
최형섭Hyung Sup Choi, 최주Ju Choi
Abstract
The kinetics of growth of the gamma prime precipitates in Rene´ 41 have been studied by means of electron microscopy. The coarsening behavior of the gamma prime precipitates was determined as a function of aging time by measuring the particle sizes of samples aged at 760℃, 840℃ and 880℃, respectively. The measured coarsening rates and particle size distributions were in good agreement with the predictions of the Lifshitz-Wagner theory of diffusion controlled coarsening at all aging temperatures examined. The value of the activation energy for the coarsening process was found from the experimental data to be 65.9 ㎉/㏖. Also the merphology of gamma prime precipitates is discussed.
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